:root {
  --blog-reading: 56rem;
  --blog-gutter: clamp(1.5rem, 4vw, 2rem);
  --blog-list-title: clamp(2rem, 4vw, 3rem);
  --blog-article-title: clamp(1.8rem, 3.5vw, 2.6rem);
  --blog-h2: 1.6rem;
  --blog-h3: 1.3rem;
  --blog-body-size: 1rem;
  --blog-body-leading: 1.9;
  --blog-title-leading: 1.35;
  --blog-tracking: -0.02em;
  --blog-muted-tint: color-mix(in srgb, var(--text-muted) 7%, var(--bg-panel));
  --blog-accent-tint: color-mix(in srgb, var(--accent) 9%, var(--bg-panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
  --blog-warn-tint: color-mix(in srgb, var(--warn) 12%, var(--bg-panel));
  --blog-promo-fill: linear-gradient(120deg, var(--accent-dark), var(--accent-dark) 55%, color-mix(in srgb, var(--ribbon-purple) 25%, var(--accent-dark)));
  --blog-ribbon-fill: linear-gradient(100deg, var(--ribbon-orange), var(--ribbon-pink), var(--ribbon-purple));
  --blog-terminal-bg: var(--text);
  --blog-terminal-text: var(--bg-panel);
  --blog-focus: 3px solid var(--accent);
  --blog-transition: 180ms ease;
  --blog-meta-size: 0.82rem;
}

.blog-index,
.blog-article {
  color: var(--text);
  font-family: var(--font-body);
}

.blog-list-wrap {
  padding-bottom: 3rem;
}

.blog-skip {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
}

.blog-skip:focus {
  transform: none;
}

.blog-index :focus-visible,
.blog-article :focus-visible,
#related-posts :focus-visible,
#post-nav :focus-visible {
  outline: var(--blog-focus);
  outline-offset: 4px;
}

.breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  font-size: var(--text-small);
  line-height: 1.8;
  color: var(--text-muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  min-width: 0;
  overflow-wrap: anywhere;
}

.breadcrumbs li + li::before {
  content: "›";
  margin-right: 0.7rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: inherit;
  text-underline-offset: 0.2em;
}

.blog-list-hero {
  position: relative;
  padding: 2.5rem 0 2.75rem;
  border-bottom: 1px solid var(--border);
}

.blog-list-hero::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 5rem;
  height: 0.25rem;
  border-radius: var(--radius-pill);
  background: var(--blog-ribbon-fill);
}

.blog-kicker {
  margin: 0 0 1rem;
  color: var(--accent-dark);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
}

.blog-list-hero h1 {
  margin: 0 0 1rem;
  font-size: var(--blog-list-title);
  font-weight: var(--weight-normal);
  line-height: var(--blog-title-leading);
}

.blog-intro {
  max-width: 45rem;
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-lead);
  line-height: 1.8;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 2rem;
}

.blog-filter {
  min-height: 2.75rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  color: var(--text-muted);
  font: inherit;
  cursor: pointer;
  transition: border-color var(--blog-transition), background var(--blog-transition), color var(--blog-transition);
}

.blog-filter:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.blog-filter[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.blog-result-status {
  margin: 1rem 0;
  color: var(--text-muted);
  font-size: var(--text-small);
}

.blog-post-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.blog-post-grid > *,
.related-grid > *,
.article-hero > *,
.stat-grid > * {
  min-width: 0;
}

.blog-post-grid .article-card,
#related-posts .article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 0;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  transition: transform var(--blog-transition), border-color var(--blog-transition), box-shadow var(--blog-transition);
}

.blog-post-grid .article-card::after,
#related-posts .article-card::after {
  content: "";
  position: absolute;
  right: 1.5rem;
  bottom: 0;
  width: 3rem;
  height: 0.2rem;
  border-radius: var(--radius-pill);
  background: var(--blog-ribbon-fill);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem 0.75rem;
  color: var(--text-muted);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
}

.article-meta time {
  font-family: var(--font-mono);
}

.article-meta .tag,
.article-meta .article-readtime {
  display: inline-block;
  max-width: 100%;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  white-space: normal;
  overflow-wrap: anywhere;
}

.article-meta .tag {
  color: var(--on-accent);
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.blog-post-grid h2,
#related-posts h3 {
  display: block;
  margin: 0;
  font-size: var(--blog-h3);
  font-weight: var(--weight-medium);
  line-height: 1.65;
}

.article-card h2 a,
.article-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.article-card h2 a:hover,
.article-card h3 a:hover {
  color: var(--accent-dark);
}

.article-summary {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.article-link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 0.25rem;
  color: var(--accent-dark);
  font-weight: var(--weight-medium);
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  background: var(--bg-panel);
}

/* 阅读列的盒宽含两侧内衬，标题、正文及文末组件共用。 */
.reading-wrap,
.article-hero,
.breadcrumbs.reading-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.article-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  align-items: start;
  column-gap: 2rem;
  row-gap: 1.5rem;
  padding-block: 1.75rem 2rem;
}

.article-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--blog-gutter);
  right: var(--blog-gutter);
  height: 0.25rem;
  border-radius: var(--radius-pill);
  background: var(--blog-ribbon-fill);
}

.article-hero-copy {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
}

.article-hero h1 {
  display: block;
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: var(--blog-article-title);
  font-weight: var(--weight-normal);
  line-height: var(--blog-title-leading);
}

.article-hero .article-summary,
.article-hero .article-deck {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

.article-hero > .article-meta,
.article-hero > .article-meta-card {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.9rem;
  min-width: 0;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  box-shadow: var(--shadow-panel);
  font-size: var(--blog-meta-size);
  line-height: 1.7;
  color: var(--text-muted);
}

.article-meta-card > * {
  max-width: 100%;
  overflow-wrap: anywhere;
}

.article-meta-card dt {
  color: var(--text-muted);
}

.article-meta-card dd {
  margin: 0.25rem 0 0;
  color: var(--text);
}

.blog-index h1,
.blog-index h2,
.blog-index h3,
.article-hero h1,
.prose h1,
.prose h2,
.prose h3,
[data-article-body] h1,
[data-article-body] h2,
[data-article-body] h3,
#related-posts h2,
#related-posts h3 {
  text-wrap: pretty;
  letter-spacing: var(--blog-tracking);
  overflow-wrap: break-word;
}

.prose,
[data-article-body] {
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  counter-reset: blog-section;
}

.prose > :first-child,
[data-article-body] > :first-child {
  margin-top: 0;
}

.prose h2,
[data-article-body] h2 {
  display: block;
  position: relative;
  margin: 2.5rem 0 1rem;
  padding-top: 0.75rem;
  font-size: var(--blog-h2);
  line-height: 1.55;
  font-weight: var(--weight-medium);
  scroll-margin-top: var(--toc-offset);
}

.prose h2::before,
[data-article-body] h2::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2.5rem;
  height: 0.2rem;
  border-radius: var(--radius-pill);
  background: var(--blog-ribbon-fill);
}

.prose h3,
[data-article-body] h3 {
  display: block;
  margin: 1.75rem 0 0.75rem;
  font-size: var(--blog-h3);
  line-height: 1.6;
  font-weight: var(--weight-medium);
}

.prose p,
[data-article-body] p {
  margin: 0 0 1.2rem;
}

.prose ul,
.prose ol,
[data-article-body] ul,
[data-article-body] ol {
  margin-block: 1rem 1.5rem;
  padding-inline-start: 1.5rem;
}

.prose li,
[data-article-body] li {
  margin-block: 0.5rem;
}

.prose a,
[data-article-body] a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

.prose img,
[data-article-body] img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.prose :not(pre) > code,
[data-article-body] :not(pre) > code {
  padding: 0.15em 0.35em;
  color: var(--accent-dark);
  background: var(--blog-accent-tint);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.prose pre,
[data-article-body] pre {
  position: relative;
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: auto;
  margin: 1.5rem 0;
  padding: 3rem 1.25rem 1.25rem;
  border: 1px solid var(--text-muted);
  border-radius: var(--radius-lg);
  color: var(--blog-terminal-text);
  background: var(--blog-terminal-bg);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.85;
  tab-size: 2;
}

.prose pre::before,
[data-article-body] pre::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  left: 1.25rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: var(--radius-round);
  background: var(--error);
  box-shadow: 1rem 0 0 var(--warn), 2rem 0 0 var(--success);
}

.prose pre code,
[data-article-body] pre code {
  padding: 0;
  color: inherit;
  background: none;
  font: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

.prose .table-scroll,
[data-article-body] .table-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.prose table,
[data-article-body] table {
  width: 100%;
  max-width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: 0.94rem;
  line-height: 1.8;
}

.prose .table-scroll table,
[data-article-body] .table-scroll table {
  margin: 0;
  min-width: 38rem;
}

.prose th,
.prose td,
[data-article-body] th,
[data-article-body] td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose thead th,
[data-article-body] thead th {
  color: var(--on-accent);
  background: var(--accent-dark);
  font-weight: var(--weight-medium);
}

.prose tbody tr:nth-child(even),
[data-article-body] tbody tr:nth-child(even) {
  background: var(--bg-panel-2);
}

.prose tbody tr:nth-child(odd),
[data-article-body] tbody tr:nth-child(odd) {
  background: var(--bg-panel);
}

.prose tbody tr:hover,
[data-article-body] tbody tr:hover {
  background: var(--blog-accent-tint);
}

.prose blockquote,
[data-article-body] blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  border-inline-start: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--bg-panel-2);
  color: var(--text-muted);
}

.callout,
.verdict {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--blog-accent-tint);
  color: var(--text);
}

.callout {
  padding-inline-start: 3.5rem;
}

.callout::before {
  content: "i";
  position: absolute;
  inset: 1.3rem auto auto 1rem;
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid currentColor;
  border-radius: var(--radius-round);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  line-height: 1.5rem;
  text-align: center;
}

.callout.warning,
.callout.callout-warning {
  border-inline-start-color: var(--warn);
  background: var(--blog-warn-tint);
}

.callout.warning::before,
.callout.callout-warning::before {
  content: "!";
  color: var(--text);
}

.callout.success,
.callout.callout-success {
  border-inline-start-color: var(--success);
  background: var(--blog-success-tint);
}

.callout.success::before,
.callout.callout-success::before {
  color: var(--success);
}

.callout > :last-child,
.verdict > :last-child,
.prose blockquote > :last-child,
[data-article-body] blockquote > :last-child {
  margin-bottom: 0;
}

.verdict > strong:first-child,
.verdict p > strong:first-child {
  color: var(--accent-dark);
  font-weight: var(--weight-brand);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  position: relative;
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--blog-accent-tint);
}

.stat-card:nth-child(even) {
  border-top-color: var(--success);
  background: var(--blog-success-tint);
}

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 1.75rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.stat-card:nth-child(even) .stat-num {
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: var(--text-small);
  line-height: 1.8;
  color: var(--text-muted);
}

.prose .check-list,
[data-article-body] .check-list,
.check-list {
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin-block: 0.65rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
}

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-block: 2rem;
  padding: 1.75rem;
  overflow: hidden;
  border: 1px solid var(--accent-dark);
  border-radius: var(--radius-lg);
  background: var(--blog-promo-fill);
  color: var(--on-accent);
}

.promo-block::before {
  content: "";
  position: absolute;
  top: 0;
  right: 1.5rem;
  width: 5rem;
  height: 0.25rem;
  border-radius: var(--radius-pill);
  background: var(--blog-ribbon-fill);
}

.promo-block .promo-copy {
  flex: 1 1 20rem;
  min-width: 0;
}

.promo-block .promo-brand {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--on-accent);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--weight-brand);
}

.promo-block p {
  margin: 0;
  color: var(--on-accent);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.promo-block .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.promo-block .btn-primary {
  color: var(--accent-dark);
  border-color: var(--bg-panel);
  background: var(--bg-panel);
}

.promo-block .btn-primary:hover {
  color: var(--accent-dark);
  background: var(--bg);
  border-color: var(--bg);
}

.promo-block .btn-ghost {
  color: var(--on-accent);
  border-color: var(--on-accent);
  background: none;
}

.promo-block .btn-ghost:hover {
  color: var(--accent-dark);
  background: var(--bg-panel);
}

.blog-list-promo {
  margin-top: 3rem;
}

#related-posts {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

#related-posts:empty,
#post-nav:empty {
  display: none;
}

#related-posts .related-heading {
  display: block;
  margin: 0 0 1.25rem;
  padding: 0;
  font-size: var(--blog-h2);
  line-height: 1.5;
  font-weight: var(--weight-medium);
}

#related-posts .related-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

#related-posts .article-card {
  padding: 1.15rem;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.65rem;
  min-width: 0;
  padding: 1.25rem;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform var(--blog-transition), border-color var(--blog-transition);
}

.post-nav-prev {
  grid-column: 1;
}

.post-nav-next {
  grid-column: 2;
}

.post-nav-label {
  color: var(--accent-dark);
  font-size: var(--text-small);
}

.post-nav-title {
  font-size: var(--blog-body-size);
  font-weight: var(--weight-medium);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

/* 仅提供兼容样式，不在列表或运行时注入悬浮入口。 */
.float-cta {
  position: fixed;
  z-index: 40;
  right: 1.25rem;
  bottom: 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  max-width: calc(100vw - 2.5rem);
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-btn);
  font-family: var(--font-body);
  font-size: var(--text-small);
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  flex: 0 0 auto;
  width: 1.2rem;
  height: 1.2rem;
  fill: none;
  stroke: currentColor;
}

@media (hover: hover) and (pointer: fine) {
  .blog-post-grid .article-card:hover,
  #related-posts .article-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
  }

  .post-nav-card:hover {
    transform: translateY(-2px);
    border-top-color: var(--accent);
  }
}

@media (max-width: 860px) {
  .prose table,
  [data-article-body] table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

  .prose th,
  .prose td,
  [data-article-body] th,
  [data-article-body] td {
    min-width: 9rem;
  }

  #related-posts .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .article-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
    padding-block: 1.5rem;
  }

  .article-hero > .article-meta,
  .article-hero > .article-meta-card {
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.6rem 0.85rem;
    padding: 0.85rem;
  }

  .article-hero-copy {
    grid-column: 1;
    grid-row: 2;
  }

  .blog-post-grid {
    grid-template-columns: 1fr;
  }

  .promo-block {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .blog-list-hero {
    padding-block: 2rem;
  }

  .blog-post-grid .article-card {
    padding: 1.25rem;
  }

  #post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-nav-next,
  .post-nav-prev {
    grid-column: 1;
  }

  .float-cta {
    right: 1rem;
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    min-height: 2.75rem;
    max-width: calc(100vw - 2rem);
    padding: 0.6rem 1rem;
  }

  body:has(.float-cta) {
    padding-bottom: calc(5rem + env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  .blog-post-grid .article-card,
  #related-posts .article-card,
  .post-nav-card,
  .float-cta,
  .blog-skip {
    transition: none;
    animation: none;
  }

  .blog-post-grid .article-card:hover,
  #related-posts .article-card:hover,
  .post-nav-card:hover {
    transform: none;
  }
}